Line of Business Information - Components of Other (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Other Income	$ (110)	$ (4)	$ (43)
Net repositioning charges	(3)	133	110
Net acquisition and restructuring costs	65	50	77
Deferred incentive compensation expense acceleration	147
Other
Segment Reporting Information [Line Items]
Other Income	(111)	0	0
Net repositioning charges	(3)	133	110
Net acquisition and restructuring costs	65	50	77
Legal and related expenses	18	(9)	172
Deferred incentive compensation expense acceleration	147	0	0
Other expenses	35	0	0
Total expenses	$ 151	$ 174	$ 359